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Commit fd51b2d7 authored by KOSAKI Motohiro's avatar KOSAKI Motohiro Committed by Ingo Molnar
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x86: update CONFIG_NUMA description 



Impact: clarify/update CONFIG_NUMA text

CONFIG_NUMA description talk about a bit old thing.
So, following changes are better.

 o CONFIG_NUMA is no longer EXPERIMENTAL

 o Opteron is not the only processor of NUMA topology on x86_64 no longer,
   but also Intel Core7i has it.

Signed-off-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d4f1b103

arch/x86/Kconfig

+10 −6
Original line number Diff line number Diff line
@@ -951,22 +951,26 @@ config ARCH_PHYS_ADDR_T_64BIT 


# Common NUMA Features

config NUMA

	bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"

	bool "Numa Memory Allocation and Scheduler Support"

	depends on SMP

	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)

	default n if X86_PC

	default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)

	help

	  Enable NUMA (Non Uniform Memory Access) support.



	  The kernel will try to allocate memory used by a CPU on the

	  local memory controller of the CPU and add some more

	  NUMA awareness to the kernel.



	  For 32-bit this is currently highly experimental and should be only

	  used for kernel development. It might also cause boot failures.

	  For 64-bit this is recommended on all multiprocessor Opteron systems.

	  If the system is EM64T, you should say N unless your system is

	  EM64T NUMA.

	  For 64-bit this is recommended if the system is Intel Core 7i

	  (or later), AMD Opteron, or EM64T NUMA.



	  For 32-bit this is only needed on (rare) 32-bit-only platforms

	  that support NUMA topologies, such as NUMAQ / Summit, or if you

	  boot a 32-bit kernel on a 64-bit NUMA platform.



	  Otherwise, you should say N.



comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"

	depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)